/**
	 * 对公众平台发送给公众账号的消息加解密示例代码.
 * 
 * @copyright Copyright (c) 1998-2014 Tencent Inc.
 */

// ------------------------------------------------------------------------

package com.financing.wap.weixin.util;

import java.io.StringReader;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;

/**
 * XMLParse class
 *
 * 提供提取消息格式中的密文及生成回复消息格式的接口.
 */
public class XMLParse {

	/**
	 * 提取出xml数据包中的加密消息
	 * @param xmltext 待提取的xml字符串
	 * @return 提取出的加密消息字符串
	 * @throws AesException 
	 */
	/*public static Object[] extract(String xmltext) throws AesException     {
		Object[] result = new Object[3];
		try {
			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();
			StringReader sr = new StringReader(xmltext);
			InputSource is = new InputSource(sr);
			Document document = db.parse(is);

			Element root = document.getDocumentElement();
			NodeList nodelist1 = root.getElementsByTagName("Encrypt");
			NodeList nodelist2 = root.getElementsByTagName("ToUserName");
			result[0] = 0;
			result[1] = nodelist1.item(0).getTextContent();
			result[2] = nodelist2.item(0).getTextContent();
			return result;
		} catch (Exception e) {
			e.printStackTrace();
			throw new AesException(AesException.ParseXmlError);
		}
	}*/

	/**
	 * 生成xml消息
	 * @param encrypt 加密后的消息密文
	 * @param signature 安全签名
	 * @param timestamp 时间戳
	 * @param nonce 随机字符串
	 * @return 生成的xml字符串
	 */
	public static String generate(String encrypt, String signature, String timestamp, String nonce) {

		String format = "<xml>\n" + "<Encrypt><![CDATA[%1$s]]></Encrypt>\n"
				+ "<MsgSignature><![CDATA[%2$s]]></MsgSignature>\n"
				+ "<TimeStamp>%3$s</TimeStamp>\n" + "<Nonce><![CDATA[%4$s]]></Nonce>\n" + "</xml>";
		return String.format(format, encrypt, signature, timestamp, nonce);

	}
	/**
	 * 生成xml消息 (请求)
	 * @param encrypt 加密后的消息密文
	 * @param signature 安全签名
	 * @return 生成的xml字符串
	 */
	public static String generateSfa(String encrypt, String signature) {

		String format = "<xml>\n" + "<Encrypt><![CDATA[%1$s]]></Encrypt>\n"
				+ "<MsgSignature><![CDATA[%2$s]]></MsgSignature>\n"
				+ "</xml>";
		return String.format(format, encrypt, signature);

	}
	/**
	 * 生成xml消息 (请求)
	 * @param encrypt 加密后的消息密文
	 * @param signature 安全签名
	 * @return 生成的xml字符串
	 */
	public static String generateSfaP(String loginname, String password) {

		String format = "<xml>\n" + "<Loginname><![CDATA[%1$s]]></Loginname>\n"
				+ "<Password><![CDATA[%2$s]]></Password>\n"
				 + "</xml>";
		return String.format(format, loginname, password);

	}
	/**生成xml消息  
	 * 根据元素，value 生产xml 如：dynamicCreationXml(new String[]{"Login","password"},"a","b")
	 * <xml>
	 * <Login><![CDATA[a]]></Login>
	 * <password><![CDATA[b]]></password>
	 * </xml>
	 * @param element 
	 * @param args
	 * @return
	 */
	public static String dynamicCreationXml(String[] element, Object ... args){
		StringBuffer buffer = new StringBuffer();
		buffer.append("<xml>\n");
		for (int i = 0; i < element.length; i++) {
			buffer.append("<");
			buffer.append(element[i]);
			buffer.append("><![CDATA[%");
			buffer.append(i+1);
			buffer.append("$s]]></");
			buffer.append(element[i]);
			buffer.append(">\n");
		}
		buffer.append("</xml>");
		return String.format(buffer.toString(), args);
		
	}
	public static void main(String[] args) {
		
		
		System.out.println(dynamicCreationXml( new String[]{"Login","password"},"a","b"));
		System.out.println(generateSfaP("a","b"));
		
		
	}
}
